Spring-hinge



Il'NrTED STATES PATENT OFFICE.

BENONI OOLVIN AND JOHN WOLFLEY, OF FBEEPORT, ILLINOIS.

sPRl'NG-HINGE.

SPECIFICATION' forming part of Letters Patent No. 318,418, dated May 19,1885.

Application filed March 14, 1885. (No model.)

To aZZ whum, it may concern- Be it known that we, BENoNr CoLvIN and JOHNWOLFLEY, citizens of the United States, residing at Freeport,in thecounty of Stephenson and State of Illinois, have invented certain newand useful Improvements in Springlinges; and we do declare the followingto be a full, clear, and eXaot description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same, reference being had to the accompanying drawings, and toletters or figures of reference marked thereon, which form a part ofthis specification.

Figure l of the drawings is a front view of our improved hingc. Fig. 2is a perspective view of one of the hinge-plates. Fig. 3 is aperspective view ot' the other hinge-plate. Fig. li is a perspectiveview of the spring with its upper and lower caps. Figs. 5 and 6 aredetail views.

This invention has relation to spring-hinges for doors; and it consistsin the construction and novel arrangement of devices,all as hereinafterset forth, and pointed outin the appended claims.

In the accompanying drawings, the letter A designates one of thehinge-plates, and Bis the other. The hinge-plate A has its journallugs cc above and below overlapping the lugs d d of the hinge-plate B,respectively, and will therefore be designated the ''upper hinge plateor section. The lower lug d of the lower hinge-plate is provided with apintle or journal-stud, e, which is rounded in its lower portion whereit engages the eye of the lower lug c of the plate A, and above thislower rounded portion the stud e is provided with a squared or prismaticbearing, g, which, when the hnge-sections'are put together, projectsinward from thelug c to engage the lower cap of the spring.

H represents a removable pintle-key, having a thumb-bearing orwrench-bearing, h, formed at its top, and extending downward through theeyes of the upper lugs o and d of the hinge-sections. That portion ofthis pintle which extends through these eyes is rounded, and inward fromthis rounded porticn extends a squared or prismatic key projection, k,which is adapted to engage the upper cap of the spring.

S represents the spring, which is spiral in form, and is provided at itslower end with the cap L, which is formed with a seat, m, to engage theupper part, g, of the lower pintle, e, and when so engaged is in fixedposition with reference to the lower hinge-platc, B. At its upper endthe spring is provided with the cap N, which is formed with a seat, n,to engage the lower part of the pintle-key H when the latter is placedin position; and as the key H is formed with ratohet-notches in itsshoulder z to engage a pawl,o, on the upper lug c it will be apparentthat the upper cap ot'the spring is designed,when adjusted, to have apositive relation to the upper hinge-plate, A.

By turning the pintle-key the tension ofthe spring can be increased ordiminished, or it can bealtered from a tension which will close the doorto one which will hold it open.

This spring-hinge will also be found convenient on account of the eascwith which doors can be hung therewith, or with which the doors can beunhinged.

In taking down the door it is only necessary to remove the pintle-keysfrom the hinges. The Springs will fall out and the door will be removedfrom the hinge-bearings at once.

Having described this invention, what we claim, and desire to secure byLetters Patent, 1s-

1. A hinge having one section provided with a fixed pintle squared atits upper end portion and rounded between its lower end and base, theother section provided with a removable pintle-key engaging a pawl orbearing thereof, and a spring having end caps engaging the pintle-keyand the fixed pintle, substantially as specified.

2. The combination, with the hinge-section A, having a pawl, thehiiige-section B, having a fixed pintle squared at its upper end, andthe removable pintle-key having a ratchetshoulder, of the springprovided with end caps engaging the fixed pintle andpintle-key,substantially as specified.

In testimony Whereof we affix oursignatures in presence of twowitnesses.

BENON I COLVIN. JOHN VOLFLEY.

Witnesses:

CHAs. W. SINGER, J AMEs BnRGsrREssER.

